Bright asked Young if he had empathy for Wilcox following the shooting, to which Young replied, "I wouldn't say empathy, I was completely in the dark about the situation."

Young said military police instructed him and others not to discuss the incident among themselves as the shooting was under investigation.

The defence went on to portray an environment in which gunplay was common in the lower ranks.

Bright brought up testimony from Thursday from one of Wilcox's fellow soldiers.

He described an incident in which two higher ranking officers approved the firing of what's known as "less lethal" ammunition at a sergeant wearing an additional flak jacket.

Young was also asked about two videos of soldiers pointing their weapons at other soldiers, and in one case a camera, and pulling the trigger.

This is Wilcox's second trial after his first conviction was overturned on appeal.

Lt.-Cmdr. Robert Fetterly heads the prosecution.

"The prosecution theory is and always has been and we've presented evidence before the court that there was a scenario of two individuals playing a game of quick draw in a tent prior to the incident," said Fetterly.

Two weeks have been set aside in September when the prosecution will call more witnesses.